What does the Bible say about the kingdom of Christ?

The kingdom of Christ is characterized by its eternal nature and sovereign governance. Unlike worldly kingdoms, which are temporary and often flawed, the kingdom of Christ is eternal and ruled by the Lord Jesus Christ, who holds preeminence over all. This kingdom is not dependent on human authority or wisdom, but rather on God's gracious will and the work of the Holy Spirit in believers' lives. The Scriptures affirm this unique kingdom, underscoring that Christ is the head of the church and has authority over all aspects of life within that kingdom, as seen in Colossians 1:18, where it states that He is the head of the body, the church.